18QHTF21-49.090902-PD

Overview

The 18QHTF21-49.090902-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 49.090902 MHz and utilizes LVCMOS output logic. The device requires a 1.8V supply voltage and supports a standby or power-down mode for energy management. It is housed in a compact 4-SMD, No Lead package suitable for surface-mount assembly.

Feature Summary

• Supports low-voltage operation with a 1.8V supply requirement
• Features LVCMOS output logic for digital interface compatibility
• Includes standby functionality to reduce power consumption during idle periods

Applications

• General-purpose clock signal generation in embedded systems
• Timing reference for digital communication interfaces
• Power-sensitive portable electronic devices requiring low voltage operation

Procurement Notes

Verify the specific frequency tolerance and operating temperature range against the official datasheet before procurement. Confirm that the 1.8V supply voltage aligns with the target system design. Ensure the 4-SMD no-lead package dimensions fit the PCB footprint constraints. Check for RoHS compliance status if required by project specifications.

Selection Notes

Select this component when a precise 49.090902 MHz clock source is required with minimal power consumption. The 1.8V supply makes it suitable for modern low-voltage logic families. Consider the standby feature if power efficiency is critical. Compare package size against available board space. Verify output drive strength requirements for the connected load.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which offers various frequencies within a small SMD form factor. The series typically provides standard XO performance with LVCMOS outputs. The 'PD' suffix likely indicates a specific packaging or tape-and-reel configuration, though exact details require datasheet confirmation. This model represents a specific frequency variant within the broader product line.

Replacement Considerations

Direct replacements must match the 49.090902 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package. Verify pinout compatibility and thermal characteristics. Cross-reference with other manufacturers offering similar low-profile oscillators. Ensure substitute parts meet the same electrical specifications and environmental ratings.